Valve



Patented Apr. 26', 1927..-

PATENT OFFICE nonnnrn. MITTON, or SALT LAKE CITLUTAH.

i VALVE.

Application filed April' 7,

My invention relates to valves and has -for its object to provide a new and efficient valve for the control of air or fluids.

lA furtherobject is to provide a valve for the controlling of ai-r from a main' storage tank to any desired destination land prim-arily for use in automobiles;

A still further object is to provide an air control valve for controlling the lair used in operating the brakes on an automobile wherein the back pressure, built up in the air lines leading to `the brakes," will automatically cut of the supply of air until more air is 'desired by the operator.

These objects I accomplish with the device illustrated in the accompanying drawings in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the speciiication forming a? part of this application, and pointed out in the .appended claims.

In the drawings I have shown the bestand most preferred method of building my invention. Figure 1 is a side elevation of my invention. Figure 2 is a transverse vertical section of the invention, and Figure 3 is a' plan view of the lower rhalf ofthe device, showing the outlet opening and the.

top of the inlet valve. f

In the drawings I have shown the flanged casing in which myvalve is constructed as A, to which a closure cap B is `secured by the bolts 1. A diaphragm C is mounted between the flanged portlons of said casing,

and cap, and is held in fixed relation 'thereto by the pressure of the bolts 1. Centrally on the outer` sideof said casing, I provide Hall externally threaded cylindrical sleeve, p0rtion 2, whichy portion is centrally bored as at 3, and its eXtreme end is internally chamfered to 'form the valve seat 14 therein. A closure cap 4 having internal threads 45 in one end thereof is screwed on the external threads of the cylindrical portion 2.ofl the casing A. A hose connection 6 is provided on the free end of the said cap 4 for connect.-- ing the said casing with the source of air supply, and another outlet air connection 7- is externally threaded and screwed into the bottom of the said casing, to which the hose line leading to the brakes of the vehicle are connected.

The said diaphragm C iscentrally bored and chamfered toforin a valve seat 8, and a raised portion 10 is provided-on the upper -side thereof to hold a ,spring 9 in central 1926. serial Nor 1oo,352.`

position over the top of said diaphragm. A cylindrical flange or housing 11 is provided on the upper face of the said cap B, and in which a cup 12 is slidably carried. The said cup 12 is provided with an eye bolt 13 on its up er fiat face, to which a lever D may be attached for operating the control valve. The said spring 9 is carried in the cup 12, and rests on the upper face ofthe diaphragm C around thel raisedportion 10, and is compressed by sliding the said cup 12 longitudinally within the said cylindrical housing 1-1. A valve 15 is held in` normally closed position in the seat 14 of the cylindrical portion 2 of the casing-A, by the ressure of a spring 16, carried between the ead of said valve 15 and the inner face of the cap 4. A valve stem 17 is provided on the upper side of the said valve 15, and has an enlarged guide member 18 medially thereon, which guide member is longitudinally slidable within the central bore of the casing A. On the free end portion of the said valve stem 17, a valve head' 19 is provided which valve seats in the seat 8 of the diaphragm C. The said guide member 18 of the valve stem 17 is milled on its periph.- ery to form air slots or grooves'20 to allow passage of air therethrough. Ports 23 are provided through the upper face of the cap B, to allow escapement of air.

The operation of my valve is as follows With the required amount of air in the supply"` tank now shown, the lever D connected with the eye bolt 13 is manually operated to ymovethe cup 12, and compress the spring 9. The pressure of the spring 9 against the ,diaphragm `C Hexesthe diaphragm C and closes the valve 19. When the valve 19 yis seated, furtherl compression of the spring '9 moves the stem 17 in the bore 3, and opens the -valve 15. vThe air then enters through vthe connection 6, and passes through the bore 3 and into the lchamber 21 vof the casing A. The air from the chamber 21 is directed throughgthe hose connection 7 to the brakes of the vehicle.VLV When the brakes have been a plied and the pressure of the air in the air .lineslhas built utp suicient back pressure, the diaphragm` 1s raised by said pressure, and the valve 15 will be seated in its seat 14, shutting oi the'supply of air from the' air supply tank. vShould more air be desired, the operator forces the diaphragm C farther down until the desired amount of air is again introduced through .icient pressure to holdsthefdiaphragm C` the valvey 15. When the operator desires to release the brakes, the lever Will he released and the diaphra m will automatically assume a normal p ane, and contact with the Avalve 19, land move the stem 17 and open the valve 14 which will allow the air -to escape through the seat 8 and into thechamber 22 of the cap B, and from therethrough the-ports 23 in the upper face thereof. The

spring 16 holds the. valve l5 normally seated at all times, and the spring 9 has only sufdesire to secure by Letters PatentA and claim l A control valve comprising a cylindrical casing having a centrally extended sleeve flange on each end, and'with a valve seat formed on one of said anges; a cup' slid- J'ablefwithin one of said sleeve anges; a

valve seat formed on the other of said flanges; an air line connection screwed thereon; a diaphragm secured in said casing, and having a valve'seat thereon; a valve stem slidahly carried in one of said sleeve flanges; and a'A valve on each end of said stem.

In testimony whereof I have aIiXed my signature.

noBERTn. MITTON., 

